diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/crypto/crypto.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/crypto/crypto.go
new file mode 100644
index 0000000..e04e968
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/crypto/crypto.go
@@ -0,0 +1,175 @@
+// Package crypto implements cryptographic functions for Kerberos 5 implementation.
+package crypto
+
+import (
+	"encoding/hex"
+	"fmt"
+
+	"gopkg.in/jcmturner/gokrb5.v7/crypto/etype"
+	"gopkg.in/jcmturner/gokrb5.v7/iana/chksumtype"
+	"gopkg.in/jcmturner/gokrb5.v7/iana/etypeID"
+	"gopkg.in/jcmturner/gokrb5.v7/iana/patype"
+	"gopkg.in/jcmturner/gokrb5.v7/types"
+)
+
+// GetEtype returns an instances of the required etype struct for the etype ID.
+func GetEtype(id int32) (etype.EType, error) {
+	switch id {
+	case etypeID.AES128_CTS_HMAC_SHA1_96:
+		var et Aes128CtsHmacSha96
+		return et, nil
+	case etypeID.AES256_CTS_HMAC_SHA1_96:
+		var et Aes256CtsHmacSha96
+		return et, nil
+	case etypeID.AES128_CTS_HMAC_SHA256_128:
+		var et Aes128CtsHmacSha256128
+		return et, nil
+	case etypeID.AES256_CTS_HMAC_SHA384_192:
+		var et Aes256CtsHmacSha384192
+		return et, nil
+	case etypeID.DES3_CBC_SHA1_KD:
+		var et Des3CbcSha1Kd
+		return et, nil
+	case etypeID.RC4_HMAC:
+		var et RC4HMAC
+		return et, nil
+	default:
+		return nil, fmt.Errorf("unknown or unsupported EType: %d", id)
+	}
+}
+
+// GetChksumEtype returns an instances of the required etype struct for the checksum ID.
+func GetChksumEtype(id int32) (etype.EType, error) {
+	switch id {
+	case chksumtype.HMAC_SHA1_96_AES128:
+		var et Aes128CtsHmacSha96
+		return et, nil
+	case chksumtype.HMAC_SHA1_96_AES256:
+		var et Aes256CtsHmacSha96
+		return et, nil
+	case chksumtype.HMAC_SHA256_128_AES128:
+		var et Aes128CtsHmacSha256128
+		return et, nil
+	case chksumtype.HMAC_SHA384_192_AES256:
+		var et Aes256CtsHmacSha384192
+		return et, nil
+	case chksumtype.HMAC_SHA1_DES3_KD:
+		var et Des3CbcSha1Kd
+		return et, nil
+	case chksumtype.KERB_CHECKSUM_HMAC_MD5:
+		var et RC4HMAC
+		return et, nil
+	//case chksumtype.KERB_CHECKSUM_HMAC_MD5_UNSIGNED:
+	//	var et RC4HMAC
+	//	return et, nil
+	default:
+		return nil, fmt.Errorf("unknown or unsupported checksum type: %d", id)
+	}
+}
+
+// GetKeyFromPassword generates an encryption key from the principal's password.
+func GetKeyFromPassword(passwd string, cname types.PrincipalName, realm string, etypeID int32, pas types.PADataSequence) (types.EncryptionKey, etype.EType, error) {
+	var key types.EncryptionKey
+	et, err := GetEtype(etypeID)
+	if err != nil {
+		return key, et, fmt.Errorf("error getting encryption type: %v", err)
+	}
+	sk2p := et.GetDefaultStringToKeyParams()
+	var salt string
+	var paID int32
+	for _, pa := range pas {
+		switch pa.PADataType {
+		case patype.PA_PW_SALT:
+			if paID > pa.PADataType {
+				continue
+			}
+			salt = string(pa.PADataValue)
+		case patype.PA_ETYPE_INFO:
+			if paID > pa.PADataType {
+				continue
+			}
+			var eti types.ETypeInfo
+			err := eti.Unmarshal(pa.PADataValue)
+			if err != nil {
+				return key, et, fmt.Errorf("error unmashaling PA Data to PA-ETYPE-INFO2: %v", err)
+			}
+			if etypeID != eti[0].EType {
+				et, err = GetEtype(eti[0].EType)
+				if err != nil {
+					return key, et, fmt.Errorf("error getting encryption type: %v", err)
+				}
+			}
+			salt = string(eti[0].Salt)
+		case patype.PA_ETYPE_INFO2:
+			if paID > pa.PADataType {
+				continue
+			}
+			var et2 types.ETypeInfo2
+			err := et2.Unmarshal(pa.PADataValue)
+			if err != nil {
+				return key, et, fmt.Errorf("error unmashalling PA Data to PA-ETYPE-INFO2: %v", err)
+			}
+			if etypeID != et2[0].EType {
+				et, err = GetEtype(et2[0].EType)
+				if err != nil {
+					return key, et, fmt.Errorf("error getting encryption type: %v", err)
+				}
+			}
+			if len(et2[0].S2KParams) == 4 {
+				sk2p = hex.EncodeToString(et2[0].S2KParams)
+			}
+			salt = et2[0].Salt
+		}
+	}
+	if salt == "" {
+		salt = cname.GetSalt(realm)
+	}
+	k, err := et.StringToKey(passwd, salt, sk2p)
+	if err != nil {
+		return key, et, fmt.Errorf("error deriving key from string: %+v", err)
+	}
+	key = types.EncryptionKey{
+		KeyType:  etypeID,
+		KeyValue: k,
+	}
+	return key, et, nil
+}
+
+// GetEncryptedData encrypts the data provided and returns and EncryptedData type.
+// Pass a usage value of zero to use the key provided directly rather than deriving one.
+func GetEncryptedData(plainBytes []byte, key types.EncryptionKey, usage uint32, kvno int) (types.EncryptedData, error) {
+	var ed types.EncryptedData
+	et, err := GetEtype(key.KeyType)
+	if err != nil {
+		return ed, fmt.Errorf("error getting etype: %v", err)
+	}
+	_, b, err := et.EncryptMessage(key.KeyValue, plainBytes, usage)
+	if err != nil {
+		return ed, err
+	}
+
+	ed = types.EncryptedData{
+		EType:  key.KeyType,
+		Cipher: b,
+		KVNO:   kvno,
+	}
+	return ed, nil
+}
+
+// DecryptEncPart decrypts the EncryptedData.
+func DecryptEncPart(ed types.EncryptedData, key types.EncryptionKey, usage uint32) ([]byte, error) {
+	return DecryptMessage(ed.Cipher, key, usage)
+}
+
+// DecryptMessage decrypts the ciphertext and verifies the integrity.
+func DecryptMessage(ciphertext []byte, key types.EncryptionKey, usage uint32) ([]byte, error) {
+	et, err := GetEtype(key.KeyType)
+	if err != nil {
+		return []byte{}, fmt.Errorf("error decrypting: %v", err)
+	}
+	b, err := et.DecryptMessage(key.KeyValue, ciphertext, usage)
+	if err != nil {
+		return nil, fmt.Errorf("error decrypting: %v", err)
+	}
+	return b, nil
+}